Rasplex running from usb

We have a shiny new GUI installer in the works, we'll make it a feature.

Has USB as a installation medium been added to the installer? RaspBMC has an elegant installer option that loads the appropriate data and structure to a USB stick as a option on install. 

Considering switching from RaspBMC to RasPlex, but since I only have the 256MB unit, it seems USB is the only way to go.

Has USB as a installation medium been added to the installer? RaspBMC has an elegant installer option that loads the appropriate data and structure to a USB stick as a option on install.


No. This is mainly because with the new media list caching methods of recent RasPlex versions there's no longer any significant advantage in running RasPlex from a USB drive. A very fast USB3 drive only makes a very minor difference in GUI speed.

NB: The new GUI speed improvements are due to increased use of RAM caching, which is bad news for 256MB units.
 

Considering switching from RaspBMC to RasPlex, but since I only have the 256MB unit, it seems USB is the only way to go.


I'm sorry, but with only 256MB RAM I doubt that RasPlex will run well.
It really needs more RAM and using a USB drive doesn't change that in any way.

You should be able to make it work with just a small Plex library, but any large library sections will cause problems.

There is a new method in the works, which should reduce the RAM cost of image caching.
But that method is still bug-ridden, so not ready for release at present.

Best regards: dlanor

Thanks.

RaspBMC runs incredibly well on a USB stick against my very large library. I'd love to switch to RASPlex, but see no need to buy new HW to get there.

If memory serves, the efficiency of read/write to USB was such that they didn't need to cache in memory. My RaspBMC config runs at an average consumption of 60-70% of available RAM.

You might take a queue from those guys. They are dealing with similar amounts of graphics and library data and RaspBMC has been bulletproof on 256MB + USB for quite awhile.

Thanks.
 
RaspBMC runs incredibly well on a USB stick against my very large library. I'd love to switch to RASPlex, but see no need to buy new HW to get there.

I agree. That would be an unwarranted cost.
 

If memory serves, the efficiency of read/write to USB was such that they didn't need to cache in memory.

That's not quite how it worked. The old versions simply didn't try to RAM-cache images, beyond those currently on display.
They did need to do it, as those old versions were quite slow in handling media list scrolling.
But they simply didn't have any such RAM-caching implemented, as could have improved the situation.
So they had to retrieve every single image from storage, every single time you scrolled a section page.
And that is why it made a HUGE difference to use a faster storage drive, such as a USB3 drive.

But a current RasPlex version without a USB drive is even faster, because it uses RAM to cache images.
So you only access the storage drive for images the first time you enter a section (per session).
But this means that it uses a lot of RAM for this cache, making it unsuitable for 256MB units.

That is where the new method I mentioned comes in, which uses a different method of RAM-caching paged image groups.
This allows it to give almost identical speed improvements, while caching a much smaller amount of images at a time.

The RAM usage of the new method is also independent of the library size, which is important for growing libraries (like mine).
But that method is still unreliable and needs more debugging before release.

Once that method has been released RasPlex should again be suitable for the old RPi units with less RAM.
 

You might take a queue from those guys. They are dealing with similar amounts of graphics and library data and RaspBMC has been bulletproof on 256MB + USB for quite awhile.

Bulletproof perhaps, but not ideal as a Plex client, in my opinion.
Even on faster hardware PlexBMC is slower than current RasPlex when it comes to Plex library navigation.
And there are some Plex features which PlexBMC simply doesn't offer, while RasPlex has everything PHT has.

I'm not trying to convince you to leave RaspBMC, but just explaining why I see RasPlex as better for me.
And perhaps it will be better for you as well, once that new caching method gets released.
But for now I suspect that you'll do better to stay with RaspBMC.

Best regards: dlanor

I have just flashed my SD card and my USB drive with version 1.0.2. I have added the line to the cmdline.txt, but the Pi is still not using the USB drive. I realise that the gains are now minimal, but this is how I have things set up and it worked fine with 0.7.0. Is there a reason it won’t work anymore?

@iminhull said:
I have just flashed my SD card and my USB drive with version 1.0.2. I have added the line to the cmdline.txt, but the Pi is still not using the USB drive. I realise that the gains are now minimal, but this is how I have things set up and it worked fine with 0.7.0. Is there a reason it won’t work anymore?

Ignore my message. Rasplex does appear to be running from the flash drive, but on a reboot, all my settings are lost. This is obviously a different issue.

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